Gas-stove.



M. OBRIEN.

GAS STOVE. APPLICATION FILED PER. 10, 190B.

Patented June 8, 1909.

mvewtoz MARSAX AN OBRIEN, OF LAWRENCE, KANSAS.

GAS-STOVE T '0 all whom it may concern:

Be it known that l, l\'l.\ns.\\'e\N OBRIEN,

a citizen of the United States, residing at Lawrence, in the countv ofDouglas and? State of Kansas, have invented certain new l I g p anduseful Improvements in GasStoves, of

which the following is a 2, the bottom of said drum b of which isprovided with depending tubes an'outer cylinder or specification. I Thisinvention relates to certain new and useful improvements in gas heatersof that type in which is employed a heating drum, and means for causingthe products of combustion and heat to take a'circuitous path sotoincrease the radiation.

' The present invention has for its objects among others to provide asimple and cheap construction in which there is a plurality ofconcentric radiating surfaces, the'inner. one

the lower ends of which in turn are received within tubes of greaterdiameter,- the inlfifi' cylinder or drum being made removable a d havinga cap designed to make a close fit over an annular collar or upwardlyextending flange on the outer cylinder or drum. The burner ispractically closed, sufiicient air for combustion being suppliedthereto, the products of combustion att'er circulatin around between thedrums through a central chamber and exit pipe therefrom. A door sprovided to permit access to the burner or for any other purpose thatmay be'require'da Other objects and adi antag'es of the invention willhereinafter appear and the novel features thereof will be particularlypointed out in the appended claim. ,9 The invention is clearlyillustrated in the accompanying drawings which, with. the numerals ofreference marked thereon, form a partof this specification, and inwhich- Figure 1 is a substantiallycentral vertical section through aheater embodying mi in vention, with the gas supply pipe n e 'ev'ationand with a portion broken away. Fig. iszncross section on the line 2-2of Fig. 1 looking in the direction of the arrow.

ike numerals of reference indicate like parts in the diflereut views.

' Referring to the drawings 1 filesignates drum designed to bev uponsuitable'supports as the legs eing closed ex cept ashereinafterspecified. At its upper end there is an annular opening 3surround ed by the collar or fian'ge 4 extending upmounted -wardly abovethe top 5 of the cylinder or i Specification of Letters lEatent.Application filed February 10, 1908.

to snugly embrace the passing out 21 carryin indicated by the V J'l'romthe space between the cylinders 10 and Patented June 8, 1909. Serial No.415,087.

drum. ln the bottom 0 of this cylinder or drum are the openings 7,'otany desired number, in this instance shown as'three,

and from this bottom (3 there extend in \vardlythe short tubes 8, joinedto the bottom (3 and at their upper ends joined to the bottom 9'01 thecylinder or drum 10 which is concentric with the cylinder 1. Thiscylinder or drum 10 is of less height than the cylinder 1, as seen inFig. 1, being open at the top, as seen at 11. p

12 is'the inner cylinder. It is open at the top, as seen at 13, itsbottom 14 being provided with a plurality of openings 15,

in this instance three, corresponding with the number of openings 7 inthe bottom 6 of the cylinder'l, and secured in these openings are thetubes 16 which depend therefrom and extend within the tubes 8,, as seenclearly in Fig. 1. Extending outwardly from the top of this innercylinder or drum is a flange 17 from which depends the annular collar orflange 18 which is designed upwardly extending flange or collar 4 of thecylinder 1 to make a tight joint therewith, as seen clearly in Fi 1.

1 9 is a closure, able form,

which may be of any suitpermitting access through the to the 12 to allowof reaching the burner to light it, or for repairs or other purposes.

Extending upwardly through the bottoms 6 and 9 of the cylinders 1 and 10is a pipe at its upper end a burner 22 of any suitable or well knowntype, the said pipe 21 being connected with the pipe 23 leading from asuitable source of fuel supply such as gas.

space between the cylinhe inner, ylinder or drum 1 2 with its.

tubes 16 can be removed at any time for repairs or other purposes, beinglifted out by flange 18, as will-be readily understood.

In use, the gas being turned on and ignited at the burner, the course ofthe heat and the products OfCOmbIIStiOII will be arrows in Fig. 1 being1;.2-upward and out 01 the open end of the cylinder 10, thence downwardin the annular space betweenthe cylinders 1 and .10 and thence towardthe center of the device and out through the exit 24. By this means theheat and products of con bustion are lrought into direct vontta-t-hhithall oi the cylinders and tubes andi the air which is drawn in throughthe tubes 8 and 16 is readily heated and the heat -is brought intodirect contact with the various cylinders which greatly increases theradiation.

\Vhat is claimed as new is The combination in a heater, of an outercylinder constructed'with top and bottom closing end portions and withopenings in its bottom end, an adjacent inner cylinder provided ,With anopen upper end and a closed lower end, pipes arranged depending; fromthe bottom of said adjacent inner cylinder, said pipes being arrangedproviding open passageway through the bottom of the outer cylinder and'leading into said adjacent cylinder, an innermost cylinder located insaid adjacent cylinder, the innermost cylinder being constructed with'an' open top end and a closed bottom end, and also made shorter thansaid adjacent cylinder, pipes with open ends arranged deleading fromaforesaid holes in the atom of the outer cylinder to and into, the innermost cylinder, a burner arranged in. said adacent cylinder, said burnerbeing located under the bottom of the innermost cylinder,

i means adapted to convey gas to the burner, the outermost cylinderbeing provided with i an exit opening, said outer, adjacent, and linnermost cylinders being constructed and 1 arranged providing up anddown passageways therehetween, leading from said j burner to aiioresaldexit opening.

3 In testimony whereotl afiix my signature in presence of two witnesses.lllARS-AVAN OB'RIEN.

Witnesses:

E. B. Henson, 1 W. T. W ELLIX'LAN.

